BHS Hydraulic crane buffers

BHS Spring-type Heavy-Duty Hydraulic Buffer
BHS spring-type heavy-duty hydraulic buffer is equipped with outside mechanical spring reset piston rod. The specialty of this hydraulic buffer is the stroke length is shorter than cylinder diameter.BHS hydraulic buffer applies to low velocity or low acceleration requirements devices.
Energy Absorption Theory
Hydraulic oil goes through multiple orifices in working, makes impact energy converted to heat energy; mechanical spring make piston rod restore in return stroke; compressed foam volume is the same with the volume that piston rod pressed to the shock tube, designed spring restoration force is only to cover friction force of piston rod restoration.
Product Details
Overview:
BHS spring-type heavy-duty hydraulic buffer is equipped with outside mechanical spring reset piston rod. The specialty of this hydraulic buffer is the stroke length is shorter than cylinder diameter.BHS hydraulic buffer applies to low speed or low acceleration requirements devices.

Performance and Advantages:
1.     The design meets the standard of OSHA,AISE,CMMA and other safety regulations like DIN and FEM.
2.     THRAIL design the throttle hole according to user’s different usage,achieving best energy absorption.
3.     Outside spring reset structure makes the compression recovery force slow and stable.
4.     Special epoxy painted cylinders and high quality chrome plated piston rod have good causticity to endure bad outside working condition.
5.     Special seal material and unique hydraulic oil can extend the standard temperature range from (-10℃~60℃) to (-35℃~100℃)
6.     Customized service:we provide special design products according to client requests.

BHS series Ordering Info
Application data needed:
Moving body weight-W(kg)
Impact Velocity-V(m/s)
Driving Force-Fp(N)
Number of buffers in Parallel-n(pcs)
Impact cycles per hour-a(cycle/hour)
Others(such as temperature,environment,standard,etc.)
Note:
1.BHS Series is customized products which needs users’ application data to design orifices.
2.Only for rear Flange installed. Other installation methods can be customized.
3.We recommend using dust cover to protect the piston rod and increase its life span,especially in dusty and harsh environment.
4.If the install location is higher than 2 meter,we suggest using safety-chain to avoid falling accident.

Model	Stroke （mm） S	Max.Energy/Cycle （KJ） ET	Max.Energy/Hour （KJ/h） ETC	Max.Damping Force (KN) Fp	Recoil Force (KN)		Weight (Kg)
					Min.	Max.
BHS64-50	50	0.5	10	12.5	65	148	3
BHS90-50	50	4	80	100	142	305	8.5
BHS90-75	75	6	108	100	105	190	9.5
BHS90-100	100	8	128	100	99	420	12
BHS100-50	50	4.4	79	110	142	305	14
BHS100-100	100	8.8	140	110	99	420	17
BHS130-70	70	10	170	179	182	425	21
BHS130-100	100	15	270	188	178	480	24
BHS130-150	150	21	294	175	183	535	28
BHS170-80	80	24	432	375	182	443	38
BHS170-150	150	45	630	375	183	535	48
BHS190-100	100	40	720	500	178	480	52
BHS190-150	150	60	840	500	183	535	64
BHS220-100	100	44	792	550	405	1340	69
BHS220-150	150	66	924	550	418	1310	76
BHS250-100	100	60	1080	750	385	1110	130
BHS250-150	150	90	1260	750	342	1080	140
BHS250-200	200	120	1560	750	330	1050	150
BHS250-300	300	180	2160	750	380	1220	170
BHS300-150	150	117	1638	975	460	1420	186
BHS300-250	250	180	2340	1125	450	1510	206
BHS340-200	200	200	2600	1250	510	1620	275
BHS340-300	300	300	3600	1250	490	1760	305
BHS360-250	250	294	3822	1470	680	1780	324
BHS360-400	400	470	4700	1470	640	1820	376

 
Dimension （Unit：mm）

Model	A1	A	B	C	D	E	F	G
BHS64-50	200	64	42	20	12	65	90	11
BHS90-50	240	90	78	30	16	100	130	14
BHS90-75	280	90	78	30	16	100	130	14
BHS90-100	360	90	78	30	16	100	130	14
BHS100-50	240	100	84	30	16	100	130	14
BHS100-100	340	100	84	30	16	100	130	14
BHS130-70	290	130	98	35	19	130	170	22
BHS130-100	350	130	98	35	19	130	170	22
BHS130-150	490	130	98	35	19	130	170	22
BHS170-80	360	170	98	50	22	170	220	26
BHS170-150	500	170	98	50	22	170	220	26
BHS190-100	440	190	98	60	25	220	280	33
BHS190-150	540	190	98	50	25	220	280	33
BHS220-100	440	220	116	60	25	220	280	33
BHS220-150	540	220	116	60	25	220	280	33
BHS250-100	480	250	138	70	32	250	320	33
BHS250-150	650	250	158	70	32	250	320	33
BHS250-200	750	250	158	70	32	250	320	33
BHS250-300	880	250	158	70	32	250	320	33
BHS300-150	650	300	170	80	36	300	400	33
BHS300-250	850	300	170	80	36	300	400	33
BHS340-200	800	340	228	100	45	340	440	39
BHS340-300	1000	340	228	100	45	340	440	39
BHS360-250	900	356	280	100	45	360	460	39
BHS360-400	1200	356	280	100	45	360	460	39

 
Installation and Routine inspection & Maintenance Notice
Installation request: Stroke length below 300mm, the max side load angle is 2.5°; above 300mm, the max side load angle can be 1°; make sure all set screws are fixed, recommend using thread glue.
 
Routine inspection & Maintenance:
xIn order to enlarge the buffers life span, if the buffer is used in safety emergency application, we recommend you to do the maintenance every 6 months. If the buffer is frequently used, please maintain it every month, details as below:
1. Piston Rod should be handled carefully not to be damaged or scratched, clear up the dusty and corrosive, coating oil to avoid rusty.
2. Please check rod seal to see if oil leakage or not.
3. Whenever necessary, please check the locking condition of Bolt and set screws at any time and fasten tight due to the strong impact
4. Please check the expansion & recovering status of piston rod, compare with the dimension when piston rod completely restored in catalogue. If can’t be fully restored, please add pneumatic in air bag, you can ask us to get operation manual.